3,549 research outputs found
Audiência de custódia: instrumento para um possível controle da banalização das prisões provisórias
No full textTCC(graduação) - Universidade Federal de Santa Catarina. Centro de Ciências Jurídicas. Direito.O sistema de justiça criminal brasileiro convive com uma série de problemas, dentre eles o excessivo número de encarcerados provisórios, o déficit de vagas do sistema prisional e o desrespeito aos princípios e garantias fundamentais dos indivíduos investigados. O presente trabalho tem como objetivo apresentar a audiência de custódia, uma prática que poderá auxiliar no controle da banalização das prisões provisórias e garantir efetividade aos tratados internacionais de direitos humanos que o Brasil é signatário. Para o desenvolvimento do mesmo foi empregado dados obtidos por meio de pesquisas realizadas por órgãos oficiais do governo, referente às prisões no Brasil, além de pesquisa bibliográfica referente à audiência de custódia
On the numerical prediction of added damping and added mass of vibrating disc-like structures in heavy fluids
No full textDisk-like structures are common in hydraulic turbomachinery. These structures are prone to near-resonant vibrations. Accurately determining their modal parameters, however, is not a trivial task. Due to the submersion in a heavy, viscous fluid, the inertia and damping of the structure are significantly influenced by the fluid added mass and damping. As a step towards accurate vibration prediction, the added damping and mass of a vibrating, water-submerged disc with a variable axial distance from a rigid wall is numerically investigated. First, a computation approach of the added mass and added damping is derived based on the vibration-induced fluid reaction force. Using this approach, requirements on numerical flow simulation for accurate added damping prediction and related uncertainties are identified by validation against experimental results. Next, the numerical flow field is analyzed, exposing the vibration-induced fluid phenomena. Additionally, we propose a methodology to study the mechanisms of the added mass and added damping effects and their transfer from fluid to structure. As a result, a numerical configuration that accurately predicts the added mass and added damping in both trend and magnitude for a set of vibration modes, vibration amplitudes, and axial gap sizes is presented for the disc system. Moreover, the cause of the nonlinear behavior of the added damping force is revealed. We demonstrate that the phase lead of the fluid reaction force with respect to the structural oscillations increases with rising vibration amplitude, implying that both the added mass and added damping depend on the vibration level of the system.The author Karim Khalfaoui would like to acknowledge the Global Glimpse program of the University of Stuttgart, Germany for their financial support for the valuable research stay at CDIF at the Polytechnical University of Catalonia. Alexandre Presas acknowledges the Serra Hunter Programme from Generalitat de Catalunya. Alexandre Presas and Greco Moraga would like to acknowledge the PID2022–139479OB-C21 project founded by the AEI of SPAIN.Peer ReviewedPostprint (published version
La filosofía del derecho de Alexandre Kojève
No full textThis article is a presentation of Alexandre Kojève’s philosophy of law, exposed in his Esquisse d’une phénoménologie du droit (1981). Little attention has been paid to this work. So there is a gap that has to be filled with a critical reflection of its strengths. Among them, undoubtedly, we count the fact that Kojève is introducing a conception of international justice that casts a singular light on current debates about cosmopolitanism and globalization. According to this author, citizenship is the key element of the process of global expansion of the juridical sphere. In sum, Kojève’s philosophy is useful to reflect upon the contrast between the juridical and the political, which is the basis for all philosophy of law, in order to achieve world peace and international justice.Este artículo es una presentación de la filosofía del derecho de Alexandre Kojève contenida en su Esquisse d’une phénoménologie du droit (1981). La poca atención que dicha obra ha recibido es un vacío que debiera llenarse con una reflexión crítica de sus puntos fuertes. Entre ellos destaca una concepción de la justicia internacional que proyecta una luz muy singular sobre los actuales debates en torno a la globalización y el cosmopolitismo. A ojos de este autor, la ciudadanía es el elemento clave para aquilatar la expansión global de lo jurídico. En suma, Kojève aparece como un valioso referente en la labor de pensar la contraposición entre lo jurídico y lo político que está en la base de toda filosofía del derecho, con la aspiración al logro de la justicia internacional y la paz mundial en el horizonte
Reconfiguração do consensualismo contratual: as ações tituladas nominativas e os limites à transmissão
No full textPartimos da evolução histórica do consensualismo contratual salientando os
principais carateres que, nos diversos momentos históricos, se foram evidenciando.
Numa segunda etapa exploramos os fundamentos dogmáticos do modelo de
transmissão contratual assumido pelo legislador e a sua viabilidade no sistema
jurídico global, em particular, no direito dos valores mobiliários. Constatamos a
crescente necessidade na prática mercantil e inevitabilidade no sistema jurídico
global da admissibilidade da existência de contratos de compra e venda de natureza
meramente obrigacional. Num terceiro momento desenvolvemos os principais
aspetos do regime jurídico aplicável às ações tituladas nominativas fora do mercado
regulado, em particular, os principais limites à transmissão, enquanto instrumentos/barreiras ao consensualismo contratual.We start from the historical evolution of contractual consensualism emphasizing the
main aspects that, in different historical moments, were showing up. In a second
stage we explore the dogmatic foundations of the transmission model contractual
assumed by the legislator and its viability in the global legal system, in particular, in
securities law. We note the growing need in commercial practice and inevitability in
the global legal system the admissibility of the existence of contracts of sale purely
obligatory. In the third stage we develop the main aspects of the legal regime
applicable to nominative titled actions outside the regulated market, in particular,
the main limits to the transmission, as instruments / barriers to contractual
consensualism
Research on the influence mechanism of operating characteristics of an 11-stage pump as turbine under turbine mode
No full textUnder the background of sustainable development of renewable energy, it is more and more important to recover the energy of high-pressure medium produced in the petrochemical process. In the field of petrochemicals, the multi-stage pump as turbine (PAT) has a strong economy. PAT can not only generate the high-pressure medium required in the petrochemical process but also recover the high-pressure medium energy that has been completed. When the multi-stage PAT is operated under the turbine condition, the internal flow state is more complicated than that under the pump condition. The hydraulic performance often has problems such as a narrow high-efficiency zone, low efficiency, and flow instability. The hydraulic performance will decrease, but the reason for the decrease in hydraulic performance is still unclear. In this paper, the mechanism of PAT internal flow loss and evolution of pressure pulsation is studied. The hydraulic performance and internal flow characteristics of the multi-stage PAT are studied by comparing the experimental and numerical simulation results. The influence of inflow conditions on the internal loss and internal flow characteristics of the PAT stage is found, and the relationship between inflow low-frequency signals 0.2fBPF and internal loss and the cumulative effect of inflow pressure pulsation is revealed.This study was supported by Joint Funds of the National Natural Science Foundation of China (U20A20292); Natural Science Foundation of Jiangsu Province (BK20210771); National Natural Science Foundation of China (51906085); China Postdoctoral Science Foundation Funded Project (2021M701847). Alexandre Presas would like to acknowledge the Serra Hunter Programme. Alexandre Presas and Yonggang Lu would like to acknowledge the PID2022-139479OB-C21 project founded by the AEI of SPAIN.Peer ReviewedPostprint (author's final draft
Hybridization of a RoR HPP with a BESS—The XFLEX HYDRO Vogelgrun Demonstrator
No full textIn the XFLEX HYDRO Vogelgrun demonstrator, a run-of-river hydropower plant, the hybridization of one turbine-generator unit with a battery energy storage system is being investigated. This paper describes the integration methodology of the hybrid control algorithm without replacing the existing speed governor of the unit. Furthermore, the comparison of the performances of a non-hybrid and hybrid unit is discussed, and first experiences gained during the operation and monitoring of the hybrid operating mode are presented.This work has been realized with the participation of INES.2S. David Valentín and Alexandre Presas acknowledge the Serra Húnter program. The corresponding author would like to express his gratitude to Nicolas Ruchonnet for his contributions during the revision.Postprint (published version
“Era por Alexandre tod’esto demostrado”: ¿pruebas verídicas y pruebas engañosas en el Libro de Alexandre?
No full textEl Libro de Alexandre es un texto de s. XIII, que se escribió en la España medieval. En este escrito, el autor pretende demostrar que, en el Alexandre, algunas de las situaciones que se ponen a prueba son aceptadas, pero eso no significa que el macedonio gane la prueba. El articulo esta dividido en tres apartados. En el primero, el autor da cuenta de la historia textual de la obra y también dedica ciertas líneas al Estado de la cuestión del texto; mientras que, en la segunda parte, nos guía a conceptos etimológicos de los términos prueba, evidencia y demás. En el tercer apartado se centra en algunas pruebas expuestas en el Libro de Alexandre.The Libro de Alexandre is a literary work, written during the medieval Spain. In this paper, the author tries to demonstrate that, carefully reading the L.A, some of the situations that are set as proves are accepted, but it does not mean that Alexander can be a victor. This paper is divided in three sections: firstly, the author tells the textual history of the L.A and, then, tries to update the State of art: on the other hand, in the second part, the author offers meanings about terms as: prueba and evidencia. Finally, the author focuses on certain passages contained in the Libro de Alexandre that can be taken as failed proves
Mixing the Immiscible: Improvisation within Fixed-Media Composition
No full textThis paper will explore ways in which mastered improvisation practice, with the studio as an instrument, is a proposed avenue to bridge the historical dichotomy between what Ted Gioia describe as ‘the aesthetics of perfection’ and ‘the aesthetics of imperfection’. It is proposed as a way to re-embody fixed music, as experimented by the author through the composition of his last fixed-media work. This will be put in the context of a wider trend observed amongst the current emerging generation of composers interested in the aesthesics of the work, by opposition to the previous generations that placed the value of the work in its poietics. The vital and primal importance of practice outcome as practice-based research’s main document will also be advocated for, as these trends are happening in the laboratory of live music
O papel de presas contaminadas no comportamento e fisiologia das planárias na investigação de microplásticos
No full textMicroplastics (1 μm to 1 mm) have become a concerning topic in the scientific community when associated with poor plastic waste management. Although the presence and abundance of these particles in freshwater environments have been previously reported, there is still an insufficient number of studies providing information about the potential trophic transfer and its consequences on freshwater benthic organisms. This work aimed to evaluate the behavioural and physiological responses of planarian Girardia tigrina after consuming contaminated prey - Chironomus riparius 4th instar larvae previously exposed to microplastics of Polyurethane (PU-MPs).
For this purpose, two investigations were carried out. In the first investigation, it was assessed the effects of PU-MPs (concentrations up to 750 mg/Kg) on C. riparius life history traits (larval size, emergence); and, when exposed to a no-observed-effect-concentration (NOEC), larvae behaviour (locomotion) and biochemical responses (oxidative damage, aerobic energy production, and energy reserves). Exposure to PU-MPs did not affect larval size nor imagoes emergence. Notwithstanding, contaminated larvae revealed higher aerobic metabolism underlined by a higher locomotion activity (curling/uncurling) but without compromising energy reserves.
In the second experiment, it was assessed the effects of the consumption of contaminated alive prey (exposed to PU-MP NOEC) in a 3h feeding assay on planarians' behaviour (nr of consumed prey, locomotion), regeneration, and physiology (energy reserves, aerobic metabolism, oxidative damage). After the feeding test, planarians consumed 20% more contaminated prey with no changes in their locomotion. The consumption of contaminated prey delayed auricles' regeneration by one day, without resulting in oxidative damage, altered aerobic metabolism or energy reserves.
These investigations bring new intel on the role of contaminated prey on planarians' behaviour and physiology in microplastic research.Os microplásticos (1 μm a 1 mm) tornaram-se um tópico preocupante na comunidade científica quando associados a uma má gestão de resíduos plásticos. Embora a presença e abundância destas partículas em ambientes de água doce tenha sido previamente reportada, ainda há um número insuficiente de estudos que fornecem informações sobre a potencial transferência trófica e as suas consequências nos organismos bentónicos de água doce. Este trabalho visou avaliar as respostas comportamentais e fisiológicas da planaria Girardia tigrina após o consumo de presas contaminadas - Chironomus riparius 4th instar larvae previamente expostas a microplásticos de Poliuretano (PU-MPs).
Para este efeito, foram efetuadas duas investigações. Na primeira investigação, foram avaliados os efeitos dos PU-MPs (concentrações até 750 mg/Kg) sobre os parâmetros da história de vida de C. riparius (tamanho larvar, emergência); e, quando expostos a uma concentração sem efeitos observados (NOEC), comportamento larvar (locomoção) e respostas bioquímicas (danos oxidativos, produção de energia aeróbica, e reservas energéticas). A exposição a PU-MPs não afetou o tamanho das larvas nem a emergência dos adultos. Não obstante, as larvas contaminadas revelaram um metabolismo aeróbio mais elevado sublinhado por uma maior atividade de locomoção (N.º de contrações corporais) mas sem comprometer as reservas energéticas.
Na segunda experiência, foram avaliados os efeitos do consumo de presas vivas contaminadas (expostas a PU-MP NOEC) num ensaio de alimentação de 3h sobre o comportamento das planárias (nº de presas consumidas, locomoção), regeneração, e fisiologia (reservas energéticas, metabolismo aeróbio, danos oxidativos). Após o ensaio de alimentação, as planárias consumiram mais 20% de presas contaminadas, sem alterações na sua locomoção. O consumo de presas contaminadas atrasou a regeneração das aurículas num dia, sem resultar em danos oxidativos, alteração do metabolismo aeróbico ou das reservas energéticas.
Estas investigações trazem novas informações sobre o papel das presas contaminadas no comportamento e fisiologia das planárias na investigação de microplásticos.Mestrado em Eco-toxicologia e Análise de Risc
Experimental study on the detection of vibrations of an operating turbine runner with sensors on the casing
No full textHydraulic turbine runners experience strong vibrations in operation, especially when resonances between runner natural frequencies and hydraulic excitations occur. Precise determination of prototype runner frequencies in operation is essential, but direct measurements are costly and technically challenging. This study presents an experimental investigation on a reduced-scale Francis model to evaluate the use of non-intrusive stationary sensors to measure runner vibrations. The runner was instrumented with accelerometers and piezoelectric patches, and an accelerometer was installed on the casing. The natural frequencies of the operating runner were excited with the patches and the vibration was measured simultaneously in the rotating and stationary structures. Results prove the feasibility of monitoring runner vibrations externally and demonstrate the correlation between rotating and stationary frames. Runner natural frequencies change and split due to confined rotation. The stationary sensor measures them with a frequency shift depending on rotating speed and nodal diameters of the excited mode shape.Mònica Egusquiza wishes to acknowledge the financial aid provided by the European Union-NextGenerationEU, Ministry of Universities and Recovery, Transformation and Resilience Plan, which through the call of Universitat Politècnica de Catalunya (Grant Ref. 2021UPC-MS-66165) provided the funds to perform the research presented in this paper. Alexandre Presas and David Valentin would like to acknowledge the Serra Hunter programme of Generalitat de Catalunya.Peer ReviewedPreprin
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